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Topic: V8 Engine Disassembly, Inspection

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humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#31

Home away from home

My Plastigage hasn't come in yet but I decided to pop one of the main bearings off to check the condition. Looks like there's some babbitt left on the bearing. For what it's worth, I measured a 2.5005 ID on the bearing with a bore gauge but who knows how accurate that is. We'll find out...

Current engine state:

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Posted on: 4/7 21:24

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#32

Home away from home

Quote:

Jack Vines wrote:
Quote:

humanpotatohybrid wrote:
By the way, it's a Nash/Hudson style 320, which has a vacuum pump under the fuel pump. IDK what oil pump was in these, I assume they just used a plate instead a second vacuum pump.

The shape of the HASH oil pan required a different pump and pickup, but AFAIK, the gears are the same. The '56 Studebaker Golden Hawk used the same pump and pickup as the Packards, but also had a flat bottom plate instead of the vacuum pump.

With the three versions Packard used, the HASH, the Hawk, that's five different oil pumps on a very short production life engine.

jack vines

For future reference, here's some pics of the Hudson/Nash oil pump. Note the pressure relief is on the opposite side of the casting.

Also, on this engine I did not need to remove the lower flywheel cover to remove the oil pan. I'm not sure what is in the way on the standard Packard engine.

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Posted on: 4/8 9:46

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#33

Home away from home

Ok so the current plan is:

- install valve guides as necessary
- hone the cylinders and install new piston rings from Egge
- install a new seals kit from MM
- oil pump modifications TBD

When my Plastigage gets in I'll check some of the bearings, but for now they appear good.

Thoughts appreciated.

Posted on: 4/9 13:18

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

Packard Don

Re: V8 Engine Disassembly, Inspection

#34

Home away from home

If you're not replacing the pistons, be sure that Egge's rings with fit the stock ones. Otherwise you'll have to find NOS.

Posted on: 4/9 13:34

All generalities are false.

Don Pierson
Packard / IMPERIAL page
CA DMV Licensed Vehicle VIN Verification

1951 Henney-Packard 3-Door Long Wheelbase Air Force Ambulance
1954 Packard Patrician
1954 Packard Patrician Parts Car
1956 Clipper Custom Sedan

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#35

Home away from home

Thanks. The dimensions on their website match what's in the Packard specs book, except depth is not listed. I asked them for clarification.

Posted on: 4/9 13:46

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

Jack Vines

Re: V8 Engine Disassembly, Inspection

#36

Home away from home

For true, Packard used a piston ring thickness of.200” (SAE K-wall) Egge piston groove depths are cut for contemporary GM/Ford D-wall .185”.

The D-wall rings will work in a K-wall piston groove, but not vice versa.

jack vines

Posted on: 4/10 11:49

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#37

Home away from home

Thanks Jack. I don't think Egge is even making 320 pistons anymore, but it sounds like whichever the rings are made for will work with Packard pistons.

I'll update when they get back to me.

Posted on: 4/10 12:23

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#38

Home away from home

Jack,

I checked with Egge and the piston rings they have are .180 thick.https://egge.com/product/piston-ring-set-61/

They also told me they can make new 320 pistons, however they don't have any full sets in stock at this time. No surprise that they are not a very hot item.

Posted on: 4/10 17:16

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

humanpotatohybrid

Re: V8 Engine Disassembly, Inspection

#39

Home away from home

How do you remove the oil pump on these? I already removed the distributor and the two oil pump cap screws. But it's not budging.

Also, is there anything special to testing the hydraulic tappets? I assume I just buy tappet pliers and follow the manual?

Posted on: 4/14 20:37

'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.

Jack Vines

Re: V8 Engine Disassembly, Inspection

#40

Home away from home

Quote:

humanpotatohybrid wrote:
How do you remove the oil pump on these? I already removed the distributor and the two oil pump cap screws. But it's not budging.

Most likely someone used Permatex. Just a tap sideways with a brass hammer is usually enough.

Quote:

humanpotatohybrid wrote:Also, is there anything special to testing the hydraulic tappets? I assume I just buy tappet pliers and follow the manual?

Visual inspection of the bottom surface is far more important than the pliers test. A lifter can test OK with the pliers and bottom be too worn to reuse.

jack vines

Posted on: 4/15 10:52

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